<button id="wiyue"></button> 數(shù)字信號處理器dsPIC33F集多通道高精度A/D轉(zhuǎn)換、多通訊模式、看門狗、CMOS Flash技術(shù)等于一體，其內(nèi)部可完成所有數(shù)據(jù)操作，實現(xiàn)總線不出芯片技術(shù)。將該處理器應(yīng)用于微機保護裝置，提出基于dsPIC33F微處理器的微機保護裝置的設(shè)計方案，給出相應(yīng)的接口電路與軟件流程。該設(shè)計方案結(jié)構(gòu)簡單，性價比及可靠性高，開發(fā)周期短，具有一定的實用推廣價值。所研制的微機保護裝置現(xiàn)場運行效果良好。 Abstract: The dsPIC33F microprocessor has a plentiful interior resource which contains multi-channel，high precision A/D converters，multi-communication module，watchdog，CMOS Flash technology，and so on.All data manipulations is accomplished interiorly.What is more，it makes the technology that bus does not go beyond the chip comes into practice.The paper put forwards a design scheme based on dsPIC33F microprocessor.The scheme has the advantages of simple Structure，high reliability and shortened exploitation cycle.What is more，it has definite practicality and reference.The microcomputer protection device has been put into operation with excellent effects.
上傳時間： 2013-11-16
上傳用戶：開懷常笑
量測/測試所面臨之問題 此測試驗證上，要使用NI公司之LAB VIEW及DAQ CARD來取代AUDIO PRECISION及其所附軟體ATS。首先需克服硬體解析度上的差異，再來是FFT（FAST FOURIER TRANSFORM,快速傳立業(yè)轉(zhuǎn)換）演算未予的撰寫，這將會影響MULTI-TONE訊號上PEAK值的偵測。另外，以RS-232為I/O介面，并呼叫客戶所提供之DLL檔來與DUT內(nèi)的IC溝通，但因LAB VIEW無法直接呼叫其Structure，故需用VC++再編譯一層新的DLL來供LAB VIEW使用。
上傳時間： 2013-12-13
上傳用戶：longlong12345678
針對眾多低成本數(shù)據(jù)采集需求，采用帶有片上USB控制器和D/A轉(zhuǎn)換器的混合信號微處理器C8051F340，設(shè)計了一款可通過USB接口和LabVIEW圖形用戶界面實現(xiàn)與PC機聯(lián)機的數(shù)據(jù)采集器，同時借助系統(tǒng)的SD卡存儲獨立實現(xiàn)現(xiàn)場長時間采集數(shù)據(jù)。該數(shù)據(jù)采集器成本低，結(jié)構(gòu)簡單，體積小，已成功用于工業(yè)現(xiàn)場。 Abstract: Aiming at the need of low cost data acquisition, a data acquisition device is designed based on C8051F340 which is a mixed-signal microcontroller and integrates USB controller and A/D controller on a chip.The data acquisition device which can combine with PC by USB interface and LabVIEW graphical user interface,can realize data acquisition. At the same time,it can be solely run a long time in virtue of SD card in field.The date aequisition device features low cost,simple Structure and little sharp, and it has been used in industry field.
標(biāo)簽： C8051F340 數(shù)據(jù) 集器設(shè)計
上傳時間： 2014-05-31
上傳用戶：1109003457
提出了一種基于C8051F320的紅外模擬槍戰(zhàn)系統(tǒng)設(shè)計方案。介紹了紅外模擬槍戰(zhàn)系統(tǒng)的構(gòu)成，給出了硬件選型、系統(tǒng)硬軟件設(shè)計。利用紅外抗對系統(tǒng)的工作原理，系統(tǒng)獲得良好效果。 Abstract: This paper presents the design of simulated gunfight system based on C8051F320.Introduces system Structure,and puts forward hardware selection of infrared simulated gunfight system and system hardware and software designs.Using the operation principle of infrared antagonizing system,the system result is good.
標(biāo)簽： C8051F320 模擬 系統(tǒng)設(shè)計
上傳時間： 2013-11-20
上傳用戶：南國時代
基于CC1110單片機公交報站系統(tǒng)主要由CC1110單片機最小系統(tǒng)和WT588D語音模塊組成，提出了如何實現(xiàn)語音報站，通過無線通信SimpliciTI網(wǎng)絡(luò)協(xié)議實現(xiàn)公交站臺的自動播報和OLCD液晶顯示公交運行的各類信息。結(jié)果表明，該公交報站系統(tǒng)報站準(zhǔn)確率99%，價格比同類產(chǎn)品下降了300%以上，系統(tǒng)組成結(jié)構(gòu)簡單，提高了系統(tǒng)的抗干擾性和穩(wěn)定性，也便于攜帶。 Abstract: The bus stop announcement system based on CC1110 MCU is composed of CC1110 MCU minimum system and WT588D voice module. How to achieve the voice announcing is put forward.The bus-stop will announce automatically and display on the OLCD by means of wireless communication SimpliciTI network protocol. As a result， the bus station stop announcement systems reported 99% accuracy rate， price of similar products declined by 300% or more， system of simple Structure， improve the anti-jamming and stability of the power system， it is also portable.
上傳時間： 2013-10-21
上傳用戶：baby25825
針對目前采用的熱敏電阻測量方法，提出了采用單總線數(shù)字式溫度傳感器DS18B20和單片機組成的新型溫度測量儀。介紹DS18B20的結(jié)構(gòu)和工作原理，以及單總線工作原理，給出了由Mega8單片機和DS18B20構(gòu)成的單總線溫度測量儀的硬件電路及軟件流程圖。經(jīng)試驗基于單總線器件DS18B20的溫度測量儀，具有測量準(zhǔn)確、測溫范圍寬、體積小、控制方便等優(yōu)點。 Abstract: This paper brings forward a new temperature meter composed of 1-Wire temperature sensor DS18B20 and MCU which has advantage of the thermistor. In the article, the DS18B20＇s Structure and controlling principles are introduced and hardware circuit and software diagram of the temperature meter are given.After been tested,the temperature meter has the advantages of accurate measurement, wide temperature range, small volume and convenient controlling.
上傳時間： 2013-10-31
上傳用戶：hzy5825468
針對視頻監(jiān)控中攝像機鏡頭光圈大小、圖像聚焦、圖像變焦三項參數(shù)的控制問題，介紹了一種基于89C51單片機的鏡頭控制電路的設(shè)計。 該電路以89C51單片機為核心，結(jié)構(gòu)簡單，成本低廉，控制可靠，實現(xiàn)了智能監(jiān)控終端對攝像參數(shù)的完全控制。 Abstract: The design of camera lens control circuit based on 89C51 is introduced. This circuit can adjust parameters of camera such as aperture, zoom and focusing. The practice of project shows that this circuit has advantages of Structure simple, low cost and high reliability.
上傳時間： 2013-10-29
上傳用戶：Wwill
為解決傳統(tǒng)可視倒車?yán)走_(dá)視頻字符疊加器結(jié)構(gòu)復(fù)雜，可靠性差，成本高昂等問題，在可視倒車?yán)走_(dá)設(shè)計中采用視頻字符發(fā)生器芯片MAX7456。該芯片集成了所有用于產(chǎn)生用戶定義OSD，并將其插入視頻信號中所需的全部功能，僅需少量的外圍阻容元件即可正常工作。給出了以MAX7456為核心的可視倒車?yán)走_(dá)的軟、硬件實現(xiàn)方案及設(shè)計實例。該方案具有電路結(jié)構(gòu)簡單、價格低廉、符合人體視覺習(xí)慣的特點。經(jīng)實際裝車測試，按該方案設(shè)計的可視倒車?yán)走_(dá)視場清晰、提示字符醒目、工作可靠，可有效降低駕駛員倒車時的工作強度、減少倒車事故的發(fā)生。 Abstract: A new video and text generation chip，MAX7456，was used in the design of video parking sensor in order to simplify system Structure，improve reliability and reduce cost. This chip included all the necessary functions to generate user-defined OSDs and to add them into the video signals. It could be put into work with addition of just a small number of resistances and capacitors. This paper provided software and hardware implementation solutions and design example based on the chip. The system had the characteristics of simplicity in circuit Structure，lower cost，and comfort for the nature of human vision. Loading road test demonstrates high video and text display quality and reliable performance，which makes the driver easy to see backward and reduces chance of accidents.
標(biāo)簽： 7456 MAX 可視倒車 中的應(yīng)用
上傳時間： 2013-12-10
上傳用戶：qiaoyue
dsPIC30F產(chǎn)品手冊 High Performance Digital Signal Controllers This section of the manual contains the following topics:1.1 Introduction 1.2 Manual Objective 1.3 Device Structure1.4 Development Support 1.5 Style and Symbol Conventions 1.6 Related Documents 1.7 Revision History
標(biāo)簽： dsPIC 30F 30 產(chǎn)品手冊
上傳時間： 2013-12-26
上傳用戶：xzt
匯編器在微處理器的驗證和應(yīng)用中舉足輕重，如何設(shè)計通用的匯編器一直是研究的熱點之一。本文提出了一種開放式的匯編器系統(tǒng)設(shè)計思想，在匯編語言與機器語言間插入中間代碼CMDL（code mapping description language）語言，打破匯編語言與機器語言的直接映射關(guān)系，由此建立起一套描述匯編語言與機器語言的開放式映射體系?；诖碎_放式映射體系開發(fā)了一套匯編器系統(tǒng)，具有較高層次上的通用性和可移植性。【關(guān)鍵詞】指令集，CMDL，匯編器，開放式 Design of Retargetable Assembler System Liu Ling Feng Wen Nan Wang Ying Chun Jiang An Ping Ji Li Jiu IME of Peking University, 100871【摘要】An assembler plays a very important role in the field of microprocessor verifications and applications, thus how to build a retargetable assembler system has been a hotspot in this field for long time. This paper presents a new method about the retargetable assembler system design.It provides a kind of language CMDL, code mapping description language. During the process of assembling, assembler languages are firstly translated to CMDL, and then mapped to the machine codes. In an other word, CMDL is inserted between assembler languages and machine codes during the translation procedure. As a medium code, CMDL has a lot of features, such as high extraction, strong descript capabilities. It can describe almost all attributes of assembler languages. By breaking the direct mapping relationship between assembler languages and machine codes, the complexities of machine codes are hided to the users, therefore, the new retargetable assembler system has higher retargetable level by converting the mapping from assembler languages and machine codes to assembler languages and CMDL, and implementationof it becomes easier. Based on the new mapping system Structure, a retargetable assemblersystem is developed. It proved the whole system has good retargetability and implantability.【關(guān)鍵詞】instruction set, symbol table, assembler, lexical analysis, retargetability
上傳時間： 2013-10-10
上傳用戶：meiguiweishi
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